Improvement in apparatus for supplying steam-blast to boiler-furnaces



E. R. STEGE. Apparatus for Supplying Steam Blast to Boiler Furnaces. No.200,674. n Patented Feb. 26,1878.

UNITED STATES PATENT QFFIGE.

EDWARD R. STEGE, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN APPARATUS FOR SUPPLYING STEAM-BLAST T0 BOILER-FURNACES.

Specification forming part of Letters Patent No. 200,674, dated February26, 1878; application filed December 19, 1877.

To all whom it may concern:

Be it known that I, EDWARD R. STEGE, of Chicago, in the county of Cookand State of Illinois, have invented a new and useful Improvement inDevices for Supplying Steam- Blast to Boiler-Furnaces, of which thefollowing is a specification:

The object 1 have in view is to produce such an arrangement of thesteam-supply pipe and the blast-pipe as to protect the blast-pipe fromthe heat of the furnace, and prevent any ashes from the grate fromfalling upon such pipe or into the steam-openings in the same, and, inconnection with the air-supply openings in the boiler-front, to make astrong blast of steam and air thrown directly against the burning fuel;and my invention therein consists in arranging the blast-pipetransversely beneath the front end of the grate and directly under thefront supporting cross-bar to the grate, and providing such blast-pipewith steam'openings, placed in line with the interstices between thegrate-bars, in combination with the steam su pply pipe and theair-openings in the boiler-front.-

In the drawings, Figure 1 is an elevation of the boiler-front; Fig. 2, alongitudinal vertical section through the boiler-furnace, and Fig. 3 across-section of the same.

Like letters denote corresponding parts.

A represents the boiler-front, having fluecleaning door a, fuel-door B,and ash-pit door 0, which latter may be provided with an airregister, 0.D is the grate, composed of a series of longitudinal bars, arranged inthe usual manner, and supported at their front and rear ends upontransverse supporting-bars d d. E is the bridge-wall, and e the sidewalls, of the furnace.

The steam-supply pipe F extends down the boiler-front, on one side ofthe same, so as to avoid the fuel-cleaning and the fuel-doors, and thenturns abruptly across to the center of the front, between the fuel andash pit doors, where it passes through such boiler-front into thefurnace, just below the plane of the grate.

The pipe F is provided with a valve, f, arranged at a convenient height,to regulate the supply of steam.

To the inner end of the pipe F is centrally connected the blast-pipe G,which is placed transversely beneath the front support 01 of the grate.This pipe G is closed at its ends, and is provided with steam-openin gsg on one side, arranged in line with the interstices between thegrate-bars, and pointing more or less in an upward direction, so as todirect the jets of steam against the burning fuel on the grate.

By having the blast-pipe situated directly under the supportingbar d, itwill be seen that this pipe will be protected in some degree from thedestructive heat of the furnace, and also from the falling ashes, sothat no ashes will fall upon the pipe or into the steam-openings whenthe blast is not in operation.

In the boiler-front, on each side of the point where the pipe F passesthrough such front, are situated air-openings h, which supply thenecessary air to the blast. These openings may be covered by suitabledoors, to regulate the admission of the air.

I am aware that a boiler-furnace has before been invented having ablast-pipeplaced transversely beneath the front end of the grate, withthe grate-bars resting directly upon the same, and provided with severalseries of openings arranged in line with the interstices between thegrate-bars, for the same is shown in patent granted May 23, 1871, to T.P. Scripter; and I am also aware that blast-pipes have been arrangedlongitudinally and transversely belowa perforated fire-bed, and havebeen provided with blast-openin gs projecting vertically into theperforations in the fire-bed, so as to direct the blast immediately intothe fuel, since such construction is shown in patent granted October 3,1876, to E. H. Murray; but

Having thus fully described my invention, what I claim as new therein,and desire to secure by Letters Patent, is-

In a boiler-furnace, the transverse blast pipe G, placed beneath thefront support d of the grate, and having steam-openings 9 arranged inline with the interstices between the grate-bars, in combination withthe steam-supply pipe F and air-openings h in the boilerfront,substantially as described.

EDWARD R. STEGE.

Witnesses:

WM. H. Lorz, EMJL H. FROMMANN.

